mgp / schulze-method

A Python implementation of the Schulze method for ranking candidates

schulze-method

A Python implementation of the Schulze method.

To rank candidates, call the compute_ranks method of the schulze module. This method has the following signature and Pydoc:

def compute_ranks(candidate_names, weighted_ranks):
    """Returns the candidates ranked by the Schulze method.

    Parameter candidate_names is a sequence containing all the candidate names.

    Parameter weighted_ranks is a sequence of (ranks, weight) pairs.

    The first element, ranks, is a ranking of the candidates. It is an array of
    arrays so that we can express ties. For example, [[a, b], [c], [d, e]]
    represents a = b > c > d = e.

    The second element, weight, is typically the number of voters that chose
    this ranking.
    """

For example usage, refer to the schulze_test module. From the command line, you can run these tests like so:

$ python -m unittest schulze_test
.....
----------------------------------------------------------------------
Ran 5 tests in 0.002s

OK

schulze-method's Issues

Problem with UTF-8 candidate names

I wrote a small program using schulze.compute_ranks, taking care of the header (-*- coding: utf-8 -*-) and writing into the output file using codecs.open("resultat.txt","w","utf-8"). I attach this file. In the output file, instead of UTF-8 data I get explicit bytes (as in u'r\xc3\xa9flexion/n:pens\xc3\xa9e/n' instead of u'réflexion/n:pensée/n'). Can this be fixed? Thanks in advance

compare-rankings.py.pdf
resultat.txt

Python 3 compatibility

Please consider #2.